performance differences M20 & M30

[Paul Gold]

we have two K class servers and wish to clone one for DR

the main server has an M30 FC array conencted but the DR server has M20 SCSI array, both have snmae amount of disk space available

what is the difference in performance between the M20 and M30 if both systems were set up the same apart from this item of hardware

the company really doesnt want to spend money on another M30 and all the FC connections if it can be helped

tahnsk

Paul Gold
CAST systems

[Insu Kim]

Model 30 (GALAXY)

Host interface
- Full-Speed Fibre Channel Arbitrated Loop
- 100 MB/s (1 GB/s)
- Short-Wave Optical Fibre Duplex SC - Connector

Drive bus
- 8-bit SCSI-2 10 MB/s (single ended); 5 buses

Storage controller
- Up to 64 MB of read/write cache per controller (minimum configuration is 5 disk modules, 1 storage controller, and 1 battery backup unit)

*** High-performance, 7200-rpm, 4.1 GB, 8.8 GB, and 17.8 GB disk modules
*** Dual active storage controllers afford dual 100 MB/s (1 GB/s) FC-AL links to single or multiple hosts
*** Up to 128 MB user-allocated read/write cache optimizes RAID performance
*** Hardware RAID implementation optimizes performance and minimizes host system overhead

Model 20 (NIKE)

Host Interface
- 16-bit SCSI-220 MB/s (Wide and Differential)

Drive Bus
- 8-bit SCSI-210 MB/s (single-ended); 2 buses

Storage Controller
- Up to 64 MB of read/write cache (minimum configuration is 5 disk drives, 2 storage controllers, and 1 battery backup unit)

Array Storage Capacity
- Up to 20 drives with up to 84 GB (with 4.2 GB disks

*** Dual-active storage controllers afford dual Fast/Wide SCSI links to a single host1 or multiple hosts
*** High performance, 7200 RPM, 4.2 GB, 8.8 GB and 17.8 GB disk modules provide high speed access.
*** Up to 64 MB user-allocated read/write cache (16 MB for Model 10) optimize the RAID 5 write performance
*** Adaptive caching algorithms on the storage processor dynamically tune the caching parameters optimizing array performance to I/O patterns that may vary over time
*** Hardware RAID implementation optimizes performance and minimizes host system overhead

Hope this helps,